<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p {
          color: red;
         }
        div {
         color: green;
        }
      </style>
    <!-- <link rel="stylesheet" href="./demo02.css"> -->
    <!-- stylesheet表示引入一个样式表 -->
</head>
<body>
    <p>咬人猫</p>
   <p>咬人猫</p>
   <p>咬人猫</p>
   <div>阿叶君</div>
   <div>阿叶君</div>
   <div>阿叶君</div>
</body>
</html>